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diff --git a/chromium/gpu/ipc/host/shader_disk_cache.h b/chromium/gpu/ipc/host/shader_disk_cache.h
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+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef GPU_IPC_HOST_SHADER_DISK_CACHE_H_
+#define GPU_IPC_HOST_SHADER_DISK_CACHE_H_
+
+#include <stdint.h>
+
+#include <map>
+#include <queue>
+#include <string>
+
+#include "base/files/file_path.h"
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/threading/thread_checker.h"
+#include "net/disk_cache/disk_cache.h"
+
+namespace gpu {
+
+class ShaderCacheFactory;
+class ShaderDiskCacheEntry;
+class ShaderDiskReadHelper;
+class ShaderClearHelper;
+
+// ShaderDiskCache is the interface to the on disk cache for
+// GL shaders.
+class ShaderDiskCache : public base::RefCounted<ShaderDiskCache> {
+ public:
+ using ShaderLoadedCallback =
+ base::Callback<void(const std::string&, const std::string&)>;
+
+ void set_shader_loaded_callback(const ShaderLoadedCallback& callback) {
+ shader_loaded_callback_ = callback;
+ }
+
+ // Store the |shader| into the cache under |key|.
+ void Cache(const std::string& key, const std::string& shader);
+
+ // Clear a range of entries. This supports unbounded deletes in either
+ // direction by using null Time values for either |begin_time| or |end_time|.
+ // The return value is a net error code. If this method returns
+ // ERR_IO_PENDING, the |completion_callback| will be invoked when the
+ // operation completes.
+ int Clear(const base::Time begin_time,
+ const base::Time end_time,
+ const net::CompletionCallback& completion_callback);
+
+ // Sets a callback for when the cache is available. If the cache is
+ // already available the callback will not be called and net::OK is returned.
+ // If the callback is set net::ERR_IO_PENDING is returned and the callback
+ // will be executed when the cache is available.
+ int SetAvailableCallback(const net::CompletionCallback& callback);
+
+ // Returns the number of elements currently in the cache.
+ int32_t Size();
+
+ // Set a callback notification for when all current entries have been
+ // written to the cache.
+ // The return value is a net error code. If this method returns
+ // ERR_IO_PENDING, the |callback| will be invoked when all entries have
+ // been written to the cache.
+ int SetCacheCompleteCallback(const net::CompletionCallback& callback);
+
+ private:
+ friend class base::RefCounted<ShaderDiskCache>;
+ friend class ShaderDiskCacheEntry;
+ friend class ShaderDiskReadHelper;
+ friend class ShaderCacheFactory;
+
+ ShaderDiskCache(ShaderCacheFactory* factory,
+ const base::FilePath& cache_path);
+ ~ShaderDiskCache();
+
+ void Init(scoped_refptr<base::SingleThreadTaskRunner> cache_task_runner);
+ void CacheCreatedCallback(int rv);
+
+ disk_cache::Backend* backend() { return backend_.get(); }
+
+ void EntryComplete(ShaderDiskCacheEntry* entry);
+ void ReadComplete();
+
+ ShaderCacheFactory* factory_;
+ bool cache_available_;
+ base::FilePath cache_path_;
+ bool is_initialized_;
+ net::CompletionCallback available_callback_;
+ net::CompletionCallback cache_complete_callback_;
+ ShaderLoadedCallback shader_loaded_callback_;
+
+ std::unique_ptr<disk_cache::Backend> backend_;
+
+ std::unique_ptr<ShaderDiskReadHelper> helper_;
+ std::unordered_map<ShaderDiskCacheEntry*,
+ std::unique_ptr<ShaderDiskCacheEntry>>
+ entries_;
+
+ DISALLOW_COPY_AND_ASSIGN(ShaderDiskCache);
+};
+
+// ShaderCacheFactory maintains a cache of ShaderDiskCache objects
+// so we only create one per profile directory.
+class ShaderCacheFactory : NON_EXPORTED_BASE(public base::ThreadChecker) {
+ public:
+ explicit ShaderCacheFactory(
+ scoped_refptr<base::SingleThreadTaskRunner> cache_task_runner);
+ ~ShaderCacheFactory();
+
+ // Clear the shader disk cache for the given |path|. This supports unbounded
+ // deletes in either direction by using null Time values for either
+ // |begin_time| or |end_time|. The |callback| will be executed when the
+ // clear is complete.
+ void ClearByPath(const base::FilePath& path,
+ const base::Time& begin_time,
+ const base::Time& end_time,
+ const base::Closure& callback);
+
+ // Retrieve the shader disk cache for the provided |client_id|.
+ scoped_refptr<ShaderDiskCache> Get(int32_t client_id);
+
+ // Set the |path| to be used for the disk cache for |client_id|.
+ void SetCacheInfo(int32_t client_id, const base::FilePath& path);
+
+ // Remove the path mapping for |client_id|.
+ void RemoveCacheInfo(int32_t client_id);
+
+ // Set the provided |cache| into the cache map for the given |path|.
+ void AddToCache(const base::FilePath& path, ShaderDiskCache* cache);
+
+ // Remove the provided |path| from our cache map.
+ void RemoveFromCache(const base::FilePath& path);
+
+ private:
+ friend class ShaderClearHelper;
+
+ scoped_refptr<base::SingleThreadTaskRunner> cache_task_runner_;
+
+ scoped_refptr<ShaderDiskCache> GetByPath(const base::FilePath& path);
+ void CacheCleared(const base::FilePath& path);
+
+ using ShaderCacheMap = std::map<base::FilePath, ShaderDiskCache*>;
+ ShaderCacheMap shader_cache_map_;
+
+ using ClientIdToPathMap = std::map<int32_t, base::FilePath>;
+ ClientIdToPathMap client_id_to_path_map_;
+
+ using ShaderClearQueue = std::queue<std::unique_ptr<ShaderClearHelper>>;
+ using ShaderClearMap = std::map<base::FilePath, ShaderClearQueue>;
+ ShaderClearMap shader_clear_map_;
+
+ DISALLOW_COPY_AND_ASSIGN(ShaderCacheFactory);
+};
+
+} // namespace gpu
+
+#endif // GPU_IPC_HOST_SHADER_DISK_CACHE_H_